Require PHP7.2 and add simple method with generator

composer.json

@@ -9,7 +9,7 @@
         }
     ],
     "require": {
-    	"php": ">=7.0",
+    	"php": ">=7.2",
         "amphp/mysql": "^1.1",
         "fzaninotto/faker": "^1.8"
     },

src/Anonymizer.php

@@ -304,7 +304,7 @@ protected function getSelectData($table, $blueprint)
             }
         }
 
-        if($columns ?? false) {
+        if(!($columns ?? false)) {
             $columns = implode(',', array_merge($blueprint->primary, array_column($blueprint->columns, 'name')));
         }
         $sql = "SELECT {$columns} FROM {$table}";

src/Blueprint.php

@@ -152,6 +152,29 @@ public function replaceWith($callback)
         return $this;
     }
 
+    /**
+     * A simple method to set data with generator
+     *
+     * @param string  $data_type
+     * @param boolean $is_unique
+     *
+     * @return void
+     */
+    public function replaceWithGenerator($data_type, $is_unique = false)
+    {
+        if($is_unique) {
+            $closure = function ($generator) use($data_type) {
+                return $generator->unique()->$data_type;
+            };
+        } else {
+            $closure = function ($generator) use($data_type) {
+                return $generator->$data_type;
+            };
+        }
+
+        return $this->replaceWith($closure);
+    }
+
     /**
      * Save all columns that need to be synchronized..
      *